CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Accounts receivable, trade allowance for doubtful accounts	$ 13,259	$ 13,420
Property, plant and equipment, accumulated depreciation	3,393,628	2,599,579
Amortizable intangible assets, accumulated amortization	$ 2,674,615	$ 2,008,573
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common Class A
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (in shares)	510,702,726	246,982,292
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	510,702,726
Common Class B [Member]
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	490,086,674	490,086,674
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	213,146,331	490,086,674
Common Class C
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (in shares)	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0	0
Customer relationships
Current Assets:
Amortizable intangible assets, accumulated amortization	$ 1,979,595	$ 1,409,021
Trade names
Current Assets:
Amortizable intangible assets, accumulated amortization	678,248	588,574
Amortizable intangible assets
Current Assets:
Amortizable intangible assets, accumulated amortization	$ 16,772	$ 10,978