Subsequent Events (Details) - Senior Notes - USD ($)	Nov. 30, 2020	Nov. 18, 2020	Oct. 31, 2020	Apr. 01, 2020
Subsequent Event
Subsequent Event [Line Items]
Aggregate principal amount		$ 1,000,000,000.0
Maximum tender amount		$ 750,000,000.0
1.150% Notes Due 2028 | Subsequent Event
Subsequent Event [Line Items]
Aggregate principal amount	$ 500,000,000.0
Debt instrument, interest rate	1.15%
1.600% Notes Due 2031 | Subsequent Event
Subsequent Event [Line Items]
Aggregate principal amount	$ 500,000,000.0
Debt instrument, interest rate	1.60%
4.50% Senior Unsecured Notes Due April 15, 2050
Subsequent Event [Line Items]
Aggregate principal amount				$ 750,000,000.0
Debt instrument, interest rate			4.50%	4.50%
4.50% Senior Unsecured Notes Due April 15, 2050 | Subsequent Event
Subsequent Event [Line Items]
Debt instrument, interest rate		4.50%
3.875% Senior Unsecured Notes Due April 15, 2030
Subsequent Event [Line Items]
Aggregate principal amount				$ 1,250,000,000
Debt instrument, interest rate			3.875%	3.875%
3.875% Senior Unsecured Notes Due April 15, 2030 | Subsequent Event
Subsequent Event [Line Items]
Debt instrument, interest rate		3.875%
3.75% Senior Unsecured Notes Due April 15, 2027
Subsequent Event [Line Items]
Aggregate principal amount				$ 750,000,000.0
Debt instrument, interest rate			3.75%	3.75%
3.75% Senior Unsecured Notes Due April 15, 2027 | Subsequent Event
Subsequent Event [Line Items]
Debt instrument, interest rate		3.75%