Goodwill and Other Intangible Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Changes In The Carrying Amount Of Goodwill

The carrying amount of goodwill as of December 31, 2014 is detailed below by reporting unit (in millions):



	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Impairment Losses			Net Carrying Amount			Gross Carrying Amount		Accumulated Impairment Losses		Net Carrying Amount
Floaters
Balance, beginning of period	$	3,081.4	$	—		$	3,081.4		$	3,081.4	$	—	$	3,081.4
Loss on impairment	—		(2,997.9		)	(2,997.9		)	—		—		—
Balance, end of period	$	3,081.4	$	(2,997.9	)	$	83.5		$	3,081.4	$	—	$	3,081.4

Jackups
Balance, beginning of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6
Loss on impairment	—		—			—			—		—		—
Balance, end of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6

Schedule of Other Intangible Assets and Liabilities

The gross carrying amounts of our drilling contract intangibles, which we consider to be definite-lived intangibles assets and intangible liabilities, and accumulated amortization as of December 31, 2014 and 2013 were as follows (in millions):



	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount			Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Drilling contract intangible assets
Balance, beginning of period	$	209.0	$	(130.6	)	$	78.4		$	209.0	$	(88.3	)	$	120.7
Amortization	—		(32.7		)	(32.7		)	—		(42.3		)	(42.3		)
Balance, end of period	$	209.0	$	(163.3	)	$	45.7		$	209.0	$	(130.6	)	$	78.4

Drilling contract intangible liabilities
Balance, beginning of period	$	278.0	$	(208.9	)	$	69.1		$	278.0	$	(160.0	)	$	118.0
Amortization	—		(28.4		)	(28.4		)	—		(48.9		)	(48.9		)
Balance, end of period	$	278.0	$	(237.3	)	$	40.7		$	278.0	$	(208.9	)	$	69.1

Schedule of Expected Amortization Income (Expense)

The estimated net (reduction) increase to future operating revenues related to the amortization of these intangible assets and liabilities as of December 31, 2014, is as follows (in millions):



2015	$	(4.5	)
2016	(.8		)
2017	.3
Total	$	(5.0	)