Fair Value (Schedule of Fair Value of Debt) (Details) - Senior notes - USD ($)	Dec. 31, 2021	Sep. 01, 2020	Jun. 22, 2020	Aug. 26, 2019	Aug. 28, 2018	Nov. 21, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 7,500,000,000
$500 3.125% senior notes due 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt						$ 500,000,000.0
Interest rate (as a percent)						3.125%
$500 3.125% senior notes due 2022 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	500,000,000
Fair value of debt	$ 507,000,000
Interest rate (as a percent)	3.125%
$300 0.450% senior notes due 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt		$ 300,000,000.0
Interest rate (as a percent)		0.45%
$300 0.450% senior notes due 2022 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 300,000,000
Fair value of debt	$ 300,000,000
Interest rate (as a percent)	0.45%
$700 3.650% senior notes due 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt					$ 700,000,000.0
Interest rate (as a percent)					3.65%
$700 3.650% senior notes due 2023 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 700,000,000
Fair value of debt	$ 730,000,000
Interest rate (as a percent)	3.65%
$500 2.350% senior notes due 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt				$ 500,000,000.0
Interest rate (as a percent)				2.35%
$500 2.350% senior notes due 2024 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 500,000,000
Fair value of debt	$ 514,000,000
Interest rate (as a percent)	2.35%
$300 3.850% senior notes due 2025 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 300,000,000
Fair value of debt	$ 323,000,000
Interest rate (as a percent)	3.85%
$700 1.000% senior notes due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt		$ 700,000,000.0
Interest rate (as a percent)		1.00%
$700 1.000% senior notes due 2025 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 700,000,000
Fair value of debt	$ 684,000,000
Interest rate (as a percent)	1.00%
$700 3.800% senior notes due 2026 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 700,000,000
Fair value of debt	$ 768,000,000
Interest rate (as a percent)	3.80%
$700 1.400% senior notes due 2027
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt		$ 700,000,000.0
Interest rate (as a percent)		1.40%
$700 1.400% senior notes due 2027 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 700,000,000
Fair value of debt	$ 680,000,000
Interest rate (as a percent)	1.40%
$800 4.200% senior notes due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt					$ 800,000,000.0
Interest rate (as a percent)					4.20%
$800 4.200% senior notes due 2028 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 800,000,000
Fair value of debt	$ 899,000,000
Interest rate (as a percent)	4.20%
$700 2.950% senior notes due 2029
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt				$ 700,000,000.0
Interest rate (as a percent)				2.95%
$700 2.950% senior notes due 2029 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 700,000,000
Fair value of debt	$ 727,000,000
Interest rate (as a percent)	2.95%
$600 2.000% senior notes due 2030
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt			$ 600,000,000.0
Interest rate (as a percent)			2.00%
$600 2.000% senior notes due 2030 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 600,000,000
Fair value of debt	$ 578,000,000
Interest rate (as a percent)	2.00%
$1,000 1.750% senior notes due 2031
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt		$ 1,000,000,000
Interest rate (as a percent)		1.75%
$1,000 1.750% senior notes due 2031 | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount of debt	$ 1,000,000,000
Fair value of debt	$ 941,000,000
Interest rate (as a percent)	1.75%