Debt - Schedule of Total Debt (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Short-term debt:
Commercial Paper	$ 1,916	$ 1,954
Total short-term debt	1,916	1,954
Long-term debt:
Total long-term debt	20,068	20,659
Total debt	21,984	22,613
Line of Credit | 2025 Term Loan due August 31, 2025
Long-term debt:
Senior notes	1,000	1,600
Total debt	$ 1,000
Senior Notes | 2025 Senior Notes (3.65%; unsecured due May 23, 2025)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.65%
Long-term debt:
Senior notes	$ 1,247	1,246
Total debt	$ 1,247
Senior Notes | 2025 Senior Notes (3.75%; unsecured due December 1, 2025)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.75%
Long-term debt:
Senior notes	$ 1,248	1,248
Total debt	$ 1,248
Senior Notes | 2027 Senior Notes (4.00%; unsecured due September 15, 2027)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.00%
Long-term debt:
Senior notes	$ 1,490	1,489
Total debt	$ 1,490
Senior Notes | 2027 Senior Notes (3.10%; unsecured due September 15, 2027)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.10%
Long-term debt:
Senior notes	$ 498	498
Total debt	$ 498
Senior Notes | 2028 Senior Notes (3.625%; unsecured due September 1, 2028)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.625%
Long-term debt:
Senior notes	$ 925	920
Total debt	$ 925
Senior Notes | 2028 Senior Notes (3.75%; unsecured due September 21, 2028)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.75%
Long-term debt:
Senior notes	$ 596	596
Total debt	$ 596
Senior Notes | 2029 Senior Notes (4.35%; unsecured due June 15, 2029)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.35%
Long-term debt:
Senior notes	$ 1,242	1,241
Total debt	$ 1,242
Senior Notes | 2030 Senior Notes (2.10%; unsecured due June 15, 2030)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.10%
Long-term debt:
Senior notes	$ 1,238	1,238
Total debt	$ 1,238
Senior Notes | 2032 Senior Notes (1.85%; unsecured due September 15, 2032)
Debt Instrument [Line Items]
Interest rate, stated percentage	1.85%
Long-term debt:
Senior notes	$ 1,487	1,486
Total debt	$ 1,487
Senior Notes | 2033 Senior Notes (4.60%; unsecured due March 15, 2033)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.60%
Long-term debt:
Senior notes	$ 1,489	1,489
Total debt	$ 1,489
Senior Notes | 2040 Senior Notes (2.65%; unsecured due September 15, 2040)
Debt Instrument [Line Items]
Interest rate, stated percentage	2.65%
Long-term debt:
Senior notes	$ 1,232	1,232
Total debt	$ 1,232
Senior Notes | 2048 Senior Notes (4.25%; unsecured due September 21, 2048)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.25%
Long-term debt:
Senior notes	$ 1,232	1,232
Total debt	$ 1,232
Senior Notes | 2050 Senior Notes (3.00%; unsecured due June 15, 2050)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.00%
Long-term debt:
Senior notes	$ 1,222	1,222
Total debt	$ 1,222
Senior Notes | 2052 Senior Notes (4.95%; unsecured due June 15, 2052)
Debt Instrument [Line Items]
Interest rate, stated percentage	4.95%
Long-term debt:
Senior notes	$ 1,466	1,466
Total debt	$ 1,466
Senior Notes | 2060 Senior Notes (3.00%; unsecured due September 15, 2060)
Debt Instrument [Line Items]
Interest rate, stated percentage	3.00%
Long-term debt:
Senior notes	$ 1,472	1,472
Total debt	$ 1,472
Senior Notes | 2062 Senior Notes (5.20%; unsecured due June 15, 2062)
Debt Instrument [Line Items]
Interest rate, stated percentage	5.20%
Long-term debt:
Senior notes	$ 984	$ 984
Total debt	$ 984