Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($)	Dec. 31, 2021	Nov. 15, 2021	Dec. 31, 2020	Sep. 01, 2020	Jun. 22, 2020	Aug. 26, 2019	Aug. 28, 2018	Dec. 19, 2016	Nov. 21, 2012
Debt Instrument [Line Items]
Total debt	$ 7,921,800,000		$ 9,560,800,000
Less current portion	(799,200,000)		(499,400,000)
Long-term debt	7,122,600,000		9,061,400,000
Credit facility | Unsecured credit facility
Debt Instrument [Line Items]
Long-term debt	470,000,000.0		1,620,000,000
Senior notes
Debt Instrument [Line Items]
Less unamortized debt issuance costs	(48,500,000)		(59,700,000)
Face amount of debt	7,500,000,000
Senior notes | $500 2.800% senior notes due 2021
Debt Instrument [Line Items]
Long-term debt	0		500,000,000.0
Face amount of debt		$ 500,000,000.0						$ 500,000,000.0
Interest rate (as a percent)		2.80%						2.80%
Senior notes | $500 2.800% senior notes due 2021 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 500,000,000
Interest rate (as a percent)	2.80%
Senior notes | $500 3.125% senior notes due 2022
Debt Instrument [Line Items]
Long-term debt	$ 500,000,000.0		500,000,000.0
Face amount of debt									$ 500,000,000.0
Interest rate (as a percent)									3.125%
Senior notes | $500 3.125% senior notes due 2022 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 500,000,000
Interest rate (as a percent)	3.125%
Senior notes | $300 0.450% senior notes due 2022
Debt Instrument [Line Items]
Long-term debt	$ 300,000,000.0		300,000,000.0
Face amount of debt				$ 300,000,000.0
Interest rate (as a percent)				0.45%
Senior notes | $300 0.450% senior notes due 2022 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 300,000,000
Interest rate (as a percent)	0.45%
Senior notes | $700 3.650% senior notes due 2023
Debt Instrument [Line Items]
Long-term debt	$ 700,000,000.0		700,000,000.0
Face amount of debt							$ 700,000,000.0
Interest rate (as a percent)							3.65%
Senior notes | $700 3.650% senior notes due 2023 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 700,000,000
Interest rate (as a percent)	3.65%
Senior notes | $500 2.350% senior notes due 2024
Debt Instrument [Line Items]
Long-term debt	$ 500,000,000.0		500,000,000.0
Face amount of debt						$ 500,000,000.0
Interest rate (as a percent)						2.35%
Senior notes | $500 2.350% senior notes due 2024 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 500,000,000
Interest rate (as a percent)	2.35%
Senior notes | $300 3.850% senior notes due 2025
Debt Instrument [Line Items]
Long-term debt	$ 300,000,000.0		300,000,000.0
Senior notes | $300 3.850% senior notes due 2025 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 300,000,000
Interest rate (as a percent)	3.85%
Senior notes | $700 1.000% senior notes due 2025
Debt Instrument [Line Items]
Long-term debt	$ 700,000,000.0		700,000,000.0
Face amount of debt				$ 700,000,000.0
Interest rate (as a percent)				1.00%
Senior notes | $700 1.000% senior notes due 2025 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 700,000,000
Interest rate (as a percent)	1.00%
Senior notes | $700 3.800% senior notes due 2026
Debt Instrument [Line Items]
Long-term debt	$ 700,000,000.0		700,000,000.0
Senior notes | $700 3.800% senior notes due 2026 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 700,000,000
Interest rate (as a percent)	3.80%
Senior notes | $700 1.400% senior notes due 2027
Debt Instrument [Line Items]
Long-term debt	$ 700,000,000.0		700,000,000.0
Face amount of debt				$ 700,000,000.0
Interest rate (as a percent)				1.40%
Senior notes | $700 1.400% senior notes due 2027 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 700,000,000
Interest rate (as a percent)	1.40%
Senior notes | $800 4.200% senior notes due 2028
Debt Instrument [Line Items]
Long-term debt	$ 800,000,000.0		800,000,000.0
Face amount of debt							$ 800,000,000.0
Interest rate (as a percent)							4.20%
Senior notes | $800 4.200% senior notes due 2028 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 800,000,000
Interest rate (as a percent)	4.20%
Senior notes | $700 2.950% senior notes due 2029
Debt Instrument [Line Items]
Long-term debt	$ 700,000,000.0		700,000,000.0
Face amount of debt						$ 700,000,000.0
Interest rate (as a percent)						2.95%
Senior notes | $700 2.950% senior notes due 2029 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 700,000,000
Interest rate (as a percent)	2.95%
Senior notes | $600 2.000% senior notes due 2030
Debt Instrument [Line Items]
Long-term debt	$ 600,000,000.0		600,000,000.0
Face amount of debt					$ 600,000,000.0
Interest rate (as a percent)					2.00%
Senior notes | $600 2.000% senior notes due 2030 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 600,000,000
Interest rate (as a percent)	2.00%
Senior notes | $1,000 1.750% senior notes due 2031
Debt Instrument [Line Items]
Long-term debt	$ 1,000,000,000		1,000,000,000
Face amount of debt				$ 1,000,000,000
Interest rate (as a percent)				1.75%
Senior notes | $1,000 1.750% senior notes due 2031 | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Face amount of debt	$ 1,000,000,000
Interest rate (as a percent)	1.75%
Senior notes | Other
Debt Instrument [Line Items]
Long-term debt	$ 300,000		$ 500,000