Share-Based Payments (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	$ 55.0	$ 41.4	$ 104.0	$ 87.6
Subtotal	82.9	42.8	132.4	93.2
Capitalized share-based compensation costs	(2.8)	(2.8)	(6.1)	(6.2)
Share-based compensation expense included in total costs and expenses	80.1	40.0	126.3	87.0
Market stock units
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	7.8	7.1	15.5	13.2
Time-vested restricted stock units
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	31.8	30.6	66.5	66.7
Cash settled performance shares
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	0.4	(0.7)	(0.6)	3.6
Performance units
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	0.3	2.0	0.8	1.2
Performance stock units settled in stock
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	12.1	1.4	14.1	2.1
Performance stock units settled in cash
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	0.9	0.3	1.9	0.4
Employee stock purchase plan
Summary of share based compensation expense associated with different programs [Abstract]
Share-based compensation expense	3.4	2.1	8.0	6.0
Nightstar | NST stock option
Summary of share based compensation expense associated with different programs [Abstract]
Fair value of post-combination equity compensation	$ 26.2	$ 0.0	$ 26.2	$ 0.0