Long-term Debt - Summary of Long-term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 12,946	$ 13,286
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,498	1,497
3.90% Senior Notes due 2028
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,460	1,457
2.65% Senior Notes due 2030
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,250	1,250
1.375% Guaranteed Notes due 2026
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,056	1,125
2.0% Guaranteed Notes due 2032
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,050	1,118
0.25% Notes due 2027
Debt Instrument [Line Items]
Long-term debt, carrying amount	951	1,013
0.50% Notes due 2031
Debt Instrument [Line Items]
Long-term debt, carrying amount	950	1,012
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount	930	930
4.30% Senior Notes due 2029
Debt Instrument [Line Items]
Long-term debt, carrying amount	846	846
3.75% Senior Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	748	748
1.00% Guaranteed Notes due 2026
Debt Instrument [Line Items]
Long-term debt, carrying amount	632	679
0.00% Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	529	563
1.40% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount	498	498
7.00% Notes due 2038
Debt Instrument [Line Items]
Long-term debt, carrying amount	203	204
5.95% Notes due 2041
Debt Instrument [Line Items]
Long-term debt, carrying amount	113	113
5.13% Notes due 2043
Debt Instrument [Line Items]
Long-term debt, carrying amount	99	98
4.00% Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	79	80
3.70% Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 54	$ 55