Indebtedness - Summary of Total Indebtedness (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal Amount	$ 7,223	$ 7,734
Fair Value of Interest Rate Swap	(274)	(239)
Unamortized (Discount) Premium	(51)	(55)
Unamortized Debt Issuance Costs	(47)	(51)
Carrying Amount	$ 6,851	$ 7,389
4.875% 2013 Senior Notes, due 2024
Debt Instrument [Line Items]
Notes payable, interest rate		4.875%
Principal Amount		$ 500
Fair Value of Interest Rate Swap		0
Unamortized (Discount) Premium		(1)
Unamortized Debt Issuance Costs		(1)
Carrying Amount		$ 498
5.25% 2014 Senior Notes, due 2044
Debt Instrument [Line Items]
Notes payable, interest rate	5.25%	5.25%
Principal Amount	$ 600	$ 600
Fair Value of Interest Rate Swap	(46)	(42)
Unamortized (Discount) Premium	3	3
Unamortized Debt Issuance Costs	(4)	(4)
Carrying Amount	$ 553	$ 557
1.75% 2015 Senior Notes, due 2027
Debt Instrument [Line Items]
Notes payable, interest rate	1.75%	1.75%
Principal Amount	$ 529	$ 534
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	0	0
Unamortized Debt Issuance Costs	(1)	(2)
Carrying Amount	$ 528	$ 532
3.25% 2017 Senior Notes, due 2028
Debt Instrument [Line Items]
Notes payable, interest rate	3.25%	3.25%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	(37)	(37)
Unamortized (Discount) Premium	(2)	(3)
Unamortized Debt Issuance Costs	(2)	(2)
Carrying Amount	$ 459	$ 458
4.25% 2018 Senior Notes, due 2029
Debt Instrument [Line Items]
Notes payable, interest rate	4.25%	4.25%
Principal Amount	$ 400	$ 400
Fair Value of Interest Rate Swap	(49)	(42)
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(2)	(2)
Carrying Amount	$ 347	$ 354
4.875% 2018 Senior Notes, due 2048
Debt Instrument [Line Items]
Notes payable, interest rate	4.875%	4.875%
Principal Amount	$ 400	$ 400
Fair Value of Interest Rate Swap	(48)	(44)
Unamortized (Discount) Premium	(6)	(6)
Unamortized Debt Issuance Costs	(3)	(4)
Carrying Amount	$ 343	$ 346
0.950% Senior Notes Due 2030
Debt Instrument [Line Items]
Notes payable, interest rate	0.95%	0.95%
Principal Amount	$ 794	$ 800
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(4)	(4)
Carrying Amount	$ 788	$ 794
3.75% 2020 Senior Notes, due 2025
Debt Instrument [Line Items]
Notes payable, interest rate	3.75%	3.75%
Principal Amount	$ 700	$ 700
Fair Value of Interest Rate Swap	(22)	(27)
Unamortized (Discount) Premium	0	(1)
Unamortized Debt Issuance Costs	(2)	(3)
Carrying Amount	$ 676	$ 669
3.25% 2020 Senior Notes, due 2050
Debt Instrument [Line Items]
Notes payable, interest rate	3.25%	3.25%
Principal Amount	$ 300	$ 300
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(4)	(4)
Unamortized Debt Issuance Costs	(3)	(3)
Carrying Amount	$ 293	$ 293
2.55% 2020 Senior Notes, due 2060
Debt Instrument [Line Items]
Notes payable, interest rate	2.55%	2.55%
Principal Amount	$ 300	$ 300
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(3)	(3)
Carrying Amount	$ 295	$ 295
2.00% 2021 Senior Notes, due 2031
Debt Instrument [Line Items]
Notes payable, interest rate	2.00%	2.00%
Principal Amount	$ 600	$ 600
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(6)	(7)
Unamortized Debt Issuance Costs	(4)	(4)
Carrying Amount	$ 590	$ 589
2.75% 2021 Senior Notes, due 2041
Debt Instrument [Line Items]
Notes payable, interest rate	2.75%	2.75%
Principal Amount	$ 600	$ 600
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(13)	(13)
Unamortized Debt Issuance Costs	(5)	(5)
Carrying Amount	$ 582	$ 582
3.10% 2021 Senior Notes, due 2061
Debt Instrument [Line Items]
Notes payable, interest rate	3.10%	3.10%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(7)	(7)
Unamortized Debt Issuance Costs	(5)	(5)
Carrying Amount	$ 488	$ 488
3.75% 2022 Senior Notes, due 2052
Debt Instrument [Line Items]
Notes payable, interest rate	3.75%	3.75%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	(56)	(35)
Unamortized (Discount) Premium	(8)	(8)
Unamortized Debt Issuance Costs	(5)	(5)
Carrying Amount	$ 431	$ 452
4.25% 2022 Senior Notes, due 2032
Debt Instrument [Line Items]
Notes payable, interest rate	4.25%	4.25%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	(16)	(12)
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(4)	(4)
Carrying Amount	$ 478	$ 482