Leases - Other (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases
Total undiscounted rent obligations	$ 5,455,900,000
Sublease rent received	22,400,000	$ 25,800,000	$ 24,400,000
Proceeds from sale-leaseback transactions	$ 0	$ 0	$ 18,900,000
Property leases | Minimum
Leases
Initial lease period (in years)	5 years
Property leases | Maximum
Leases
Initial lease period (in years)	20 years
Equipment leases | Maximum
Leases
Initial lease period (in years)	5 years