Pension and Postretirement Benefit Plans and Defined Contribution Plans - Plan Assets (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 647	$ 753	$ 588
U.S. [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		100.00%
Fair value of plan assets		$ 10,871	16,346	16,094
U.S. [Member] | Pension Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,607	2,332
U.S. [Member] | Pension Plan [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,355	10,726
U.S. [Member] | Pension Plan [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	2
U.S. [Member] | Pension Plan [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	2,908	3,286
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 828	1,326
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		0.00%
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		10.00%
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 49	78
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		779	1,248
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 0	0
U.S. [Member] | Pension Plan [Member] | Equity securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		20.00%
U.S. [Member] | Pension Plan [Member] | Equity securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		40.00%
U.S. [Member] | Pension Plan [Member] | Global Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 1,555	2,273
U.S. [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,553	2,233
U.S. [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	38
U.S. [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	2
U.S. [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0	0
U.S. [Member] | Pension Plan [Member] | Equity commingled funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		165	1,352
U.S. [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		165	1,152
U.S. [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 0	200
U.S. [Member] | Pension Plan [Member] | Fixed income securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		45.00%
U.S. [Member] | Pension Plan [Member] | Fixed income securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		75.00%
U.S. [Member] | Pension Plan [Member] | Corporate debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 3,512	5,566
U.S. [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		5	18
U.S. [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,507	5,548
U.S. [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
U.S. [Member] | Pension Plan [Member] | Corporate debt [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0
U.S. [Member] | Pension Plan [Member] | Government and Agency Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	1,772	2,533
U.S. [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0	0
U.S. [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	1,772	2,533
U.S. [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0	0
U.S. [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[2]	0	0
U.S. [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		16	38
U.S. [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			0
U.S. [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		16	38
U.S. [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 0	0
U.S. [Member] | Pension Plan [Member] | Other investments [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		5.00%
U.S. [Member] | Pension Plan [Member] | Other investments [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		20.00%
U.S. [Member] | Pension Plan [Member] | Partnership Interest [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	$ 2,152	2,079
U.S. [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0	3
U.S. [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]		0
U.S. [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0	0
U.S. [Member] | Pension Plan [Member] | Partnership Interest [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[3]	2,152	2,076
U.S. [Member] | Pension Plan [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		116	158
U.S. [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		116	158
U.S. [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0	0
U.S. [Member] | Pension Plan [Member] | Other Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	756	1,019
U.S. [Member] | Pension Plan [Member] | Other Commingled Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	0	0
U.S. [Member] | Pension Plan [Member] | Other Commingled Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]		10
U.S. [Member] | Pension Plan [Member] | Other Commingled Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	0	0
U.S. [Member] | Pension Plan [Member] | Other Commingled Funds [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[4]	$ 756	1,009
U.S. [Member] | Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage	[5]	100.00%
Fair value of plan assets	[5]	$ 647	753
U.S. [Member] | Postretirement Benefits Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	1	3
U.S. [Member] | Postretirement Benefits Plan [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	646	750
U.S. [Member] | Postretirement Benefits Plan [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]		0
U.S. [Member] | Postretirement Benefits Plan [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[5]		0
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 97	85
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		0.00%
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		5.00%
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 1	3
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	96	82
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]		0
U.S. [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[5]		0
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 551	669
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		95.00%
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		100.00%
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 0
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 551	669
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]		0
U.S. [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[5]		0
International [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		100.00%
Fair value of plan assets		$ 6,865	10,729	9,811
International [Member] | Pension Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		58	191
International [Member] | Pension Plan [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,498	6,672
International [Member] | Pension Plan [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,455	1,677	$ 1,362
International [Member] | Pension Plan [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	1,853	2,189
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 221	541
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		0.00%
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		10.00%
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 58	191
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		163	346
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 0	3
International [Member] | Pension Plan [Member] | Equity securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		10.00%
International [Member] | Pension Plan [Member] | Equity securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		20.00%
International [Member] | Pension Plan [Member] | Equity commingled funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 714	1,453
International [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		672	1,386
International [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 42	67
International [Member] | Pension Plan [Member] | Fixed income securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		45.00%
International [Member] | Pension Plan [Member] | Fixed income securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		70.00%
International [Member] | Pension Plan [Member] | Corporate debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 569	1,187
International [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		569	1,187
International [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Corporate debt [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0	0
International [Member] | Pension Plan [Member] | Government and Agency Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	862	2,415
International [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0	0
International [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	862	2,415
International [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0	0
International [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[2]	0	0
International [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,053	2,266
International [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,045	1,138
International [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 1,008	1,128
International [Member] | Pension Plan [Member] | Other investments [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		15.00%
International [Member] | Pension Plan [Member] | Other investments [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		35.00%
International [Member] | Pension Plan [Member] | Partnership Interest [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	$ 128	107
International [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0	0
International [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	1	2
International [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0	0
International [Member] | Pension Plan [Member] | Partnership Interest [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[3]	126	106
International [Member] | Pension Plan [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,197	1,329
International [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		54	56
International [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,143	1,273
International [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0	0
International [Member] | Pension Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	1,122	1,431
International [Member] | Pension Plan [Member] | Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	0	0
International [Member] | Pension Plan [Member] | Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	133	141
International [Member] | Pension Plan [Member] | Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	312	404
International [Member] | Pension Plan [Member] | Other [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[4]	$ 677	$ 886

[1] Certain investments that are measured at NAV per share (or its equivalent) have not been classified in the fair value hierarchy. The NAV amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented for the total pension benefits plan assets.

[2] Government and agency obligations are inclusive of repurchase agreements

[3] Mainly includes investments in private equity, private debt, public equity limited partnerships, and, to a lesser extent, real estate and venture capital.

[4] Mostly includes investments in hedge funds and real estate.

[5] Reflects postretirement plan assets, which support a portion of our U.S. retiree medical plans.