Pension and Postretirement Benefit Plans and Defined Contribution Plans - Plan Assets (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 753	$ 588	$ 519
US [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		100.00%
Fair value of plan assets		$ 16,346	16,094	14,586
US [Member] | Pension Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,332	3,306
US [Member] | Pension Plan [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		10,726	10,103
US [Member] | Pension Plan [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2	1
US [Member] | Pension Plan [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	3,286	2,684
US [Member] | Pension Plan [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 1,326	781
US [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%
US [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%
US [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 78	70
US [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,248	711
US [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
US [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
US [Member] | Pension Plan [Member] | Equity securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		20.00%
US [Member] | Pension Plan [Member] | Equity securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		40.00%
US [Member] | Pension Plan [Member] | Global Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 2,273	3,241
US [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,233	3,213
US [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		38	27
US [Member] | Pension Plan [Member] | Global Equity Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2	1
US [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
US [Member] | Pension Plan [Member] | Equity commingled funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,352	1,325
US [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
US [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,152	1,110
US [Member] | Pension Plan [Member] | Equity commingled funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
US [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]	$ 200	215
US [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%
US [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%
US [Member] | Pension Plan [Member] | Corporate debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 5,566	6,499
US [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		18	23
US [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		5,548	6,476
US [Member] | Pension Plan [Member] | Corporate debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
US [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
US [Member] | Pension Plan [Member] | Government and Agency Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	2,533	1,555
US [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
US [Member] | Pension Plan [Member] | Government and Agency Obligations [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	2,533	1,555
US [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
US [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
US [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		38	23
US [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			0
US [Member] | Pension Plan [Member] | Fixed Income Commingled Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		38	23
US [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
US [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
US [Member] | Pension Plan [Member] | Other investments [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		5.00%
US [Member] | Pension Plan [Member] | Other investments [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity and debt securities, target allocation percentage		20.00%
US [Member] | Pension Plan [Member] | Partnership Interest [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	$ 2,079	1,431
US [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	3	0
US [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]		0
US [Member] | Pension Plan [Member] | Partnership Interest [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0	0
US [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]	2,076	1,431
US [Member] | Pension Plan [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		158	190
US [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
US [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		158	190
US [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
US [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
US [Member] | Pension Plan [Member] | Other Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	1,019	1,049
US [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
US [Member] | Pension Plan [Member] | Other Commingled Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	10	11
US [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
US [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]	$ 1,009	1,038
US [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]	$ 753	588
US [Member] | Postretirement Benefits Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	3
US [Member] | Postretirement Benefits Plan [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	750	588
US [Member] | Postretirement Benefits Plan [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]		0
US [Member] | Postretirement Benefits Plan [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1],[5]		0
US [Member] | Postretirement Benefits Plan [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 85	0
US [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%
US [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%
US [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]	$ 3
US [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]	82	0
US [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
US [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
US [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 669	588
US [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%
US [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%
US [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 0
US [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 669	588
US [Member] | Postretirement Benefits Plan [Member] | Insurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]		0
US [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		$ 10,729	9,811	8,956
International [Member] | Pension Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		191	61
International [Member] | Pension Plan [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,672	5,681
International [Member] | Pension Plan [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,677	1,362	$ 1,342
International [Member] | Pension Plan [Member] | Assets Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	2,189	2,707
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 541	407
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		$ 191	61
International [Member] | Pension Plan [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		346	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]	$ 3	0
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		$ 1,453	2,051
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		1,386	1,681
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]	$ 67	370
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		$ 1,187	925
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		1,187	925
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]	2,415	1,334
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]	2,415	1,334
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		2,266	2,484
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		1,138	1,217
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]	$ 1,128	1,267
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]	$ 107	69
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]	2	3
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]	106	66
International [Member] | Pension Plan [Member] | Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,329	1,027
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		56	57
International [Member] | Pension Plan [Member] | Insurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,273	969
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	1
International [Member] | Pension Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	1,431	1,514
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]	141	117
International [Member] | Pension Plan [Member] | Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	404	393
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]	$ 886	$ 1,003

[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.