Presentation of Financial Statements (Details) - USD ($)			3 Months Ended		6 Months Ended
	Mar. 23, 2020	Feb. 19, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Apr. 01, 2020	Dec. 31, 2019
Repositioning costs and net loss on dispositions			$ 277,900,000	$ 0	$ 277,900,000	$ 0
Incremental severance costs			150,000,000.0
Real estate operating lease ROU asset and other asset impairment charges			55,800,000
Other real estate exit costs			47,000,000.0
Dispositions and other repositioning charges			25,100,000
Long-term debt, carrying amount			5,724,400,000		5,724,400,000			$ 5,122,800,000
Equity method investment, other than temporary impairment					3,900,000
Bad debt expense					17,000,000.0
Allowance for doubtful accounts			34,200,000		34,200,000			21,500,000
2.45% Senior Notes due 2030
Long-term debt, carrying amount		$ 600,000,000	$ 600,000,000.0		$ 600,000,000.0			0
Long-term debt, interest rate		2.45%	2.45%		2.45%
Long-term debt, maturity date		Apr. 30, 2030
4.45% Senior Notes due 2020
Long-term debt, carrying amount			$ 0		$ 0			600,000,000.0
Long-term debt, interest rate			4.45%		4.45%
Extinguishment of Debt, Amount	$ 600,000,000
4.20% Senior Notes due 2030
Long-term debt, carrying amount			$ 600,000,000.0		$ 600,000,000.0		$ 600,000,000	$ 0
Long-term debt, interest rate							4.20%
364 Day Credit Facility [Member]
Credit Facilities, maximum borrowing capacity			400,000,000		400,000,000
Credit Facility [Member]
Credit Facilities, maximum borrowing capacity			$ 2,500,000,000		$ 2,500,000,000