Debt - Schedule of Outstanding Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Short-term debt:
Commercial Paper	$ 1,268	$ 1,012
Other short-term debt	9	10
Total short-term debt	1,777	1,521
Long-term debt:
Total long-term debt	12,401	12,397
Total debt	$ 14,178	13,918
2022 Senior Notes (2.35% senior unsecured notes due September 15, 2022) \| Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage	2.35%
Short-term debt:
Total short-term debt	$ 500	499
Senior Notes \| 2022 Senior Notes (2.35% senior unsecured notes due September 15, 2022)
Long-term debt:
Total debt	$ 500
Senior Notes \| 2023 Senior Notes (0.70% senior unsecured notes due June 15, 2023)
Debt Instrument [Line Items]
Interest rate, stated percentage	0.70%
Long-term debt:
Senior notes	$ 998	997
Total debt	$ 998
Senior Notes \| 2023 Senior Notes (3.45% senior unsecured notes due September 21, 2023)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.45%
Long-term debt:
Senior notes	$ 399	399
Total debt	$ 399
Senior Notes \| 2023 Senior Notes (4.00% senior unsecured notes due October 15, 2023)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.00%
Long-term debt:
Senior notes	$ 798	797
Total debt	$ 798
Senior Notes \| 2025 Senior Notes (3.75% senior unsecured notes due December 1, 2025)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.75%
Long-term debt:
Senior notes	$ 1,246	1,246
Total debt	$ 1,246
Senior Notes \| 2027 Senior Notes (3.10% senior unsecured notes due September 15, 2027)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.10%
Long-term debt:
Senior notes	$ 497	497
Total debt	$ 497
Senior Notes \| 2028 Senior Notes (3.75% senior unsecured notes due September 21, 2028)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.75%
Long-term debt:
Senior notes	$ 594	594
Total debt	$ 594
Senior Notes \| 2030 Senior Notes (2.10% senior unsecured notes due June 15, 2030)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.10%
Long-term debt:
Senior notes	$ 1,235	1,234
Total debt	$ 1,235
Senior Notes \| 2032 Senior Notes (1.85% senior unsecured notes due September 15, 2032)
Debt Instrument [Line Items]
Interest rate, stated percentage	1.85%
Long-term debt:
Senior notes	$ 1,483	1,483
Total debt	$ 1,483
Senior Notes \| 2040 Senior Notes (2.65% senior unsecured notes due September 15, 2040)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.65%
Long-term debt:
Senior notes	$ 1,230	1,230
Total debt	$ 1,230
Senior Notes \| 2048 Senior Notes (4.25% senior unsecured notes due September 21, 2048)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.25%
Long-term debt:
Senior notes	$ 1,231	1,230
Total debt	$ 1,231
Senior Notes \| 2050 Senior Notes (3.00% senior unsecured notes due June 15, 2050)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.00%
Long-term debt:
Senior notes	$ 1,220	1,220
Total debt	$ 1,220
Senior Notes \| 2060 Senior Notes (3.00% senior unsecured notes due September 15, 2060)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.00%
Long-term debt:
Senior notes	$ 1,470	$ 1,470
Total debt	$ 1,470

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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