Fair Value Measurements and the Fair Value Option - Derivatives Financial Instruments (Details) € in Millions, ¥ in Millions, £ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 GBP (£)	Jun. 30, 2016 JPY (¥)	Jun. 30, 2016 EUR (€)	Dec. 31, 2015 USD ($)
Derivative [Line Items]
Hedge Asset	$ 20,400,000				$ 30,900,000
Foreign Exchange Contract, One [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount | €				€ 130.0
Foreign Exchange Contract, Four [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount | £		£ 302.7
Foreign Exchange Contract, Five [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount | ¥			¥ 757.0
KWE [Member] | Foreign Exchange Contract, Two [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount | €				€ 360.0
Level 2 [Member] | Foreign Exchange Contract, One [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	300,000
Hedge Liability	(900,000)
Change in Unrealized Gains (Losses)	(100,000)
Realized Gains (Losses)	0
Cash Received (Paid)	0
Level 2 [Member] | Foreign Exchange Contract, Four [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	18,700,000
Hedge Liability	(400,000)
Change in Unrealized Gains (Losses)	13,400,000
Realized Gains (Losses)	1,000,000
Cash Received (Paid)	(3,400,000)
Level 2 [Member] | Foreign Exchange Contract, Five [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	0
Hedge Liability	(700,000)
Change in Unrealized Gains (Losses)	(700,000)
Realized Gains (Losses)	0
Cash Received (Paid)	0
Level 2 [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	20,400,000
Hedge Liability	(61,900,000)
Change in Unrealized Gains (Losses)	(91,800,000)
Realized Gains (Losses)	7,600,000
Cash Received (Paid)	22,300,000
Level 2 [Member] | Derivative Settled [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	1,100,000
Hedge Liability	0
Change in Unrealized Gains (Losses)	4,200,000
Realized Gains (Losses)	6,600,000
Cash Received (Paid)	25,700,000
Level 2 [Member] | Derivatives Outstanding [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	19,300,000
Hedge Liability	(61,900,000)
Change in Unrealized Gains (Losses)	(96,000,000)
Realized Gains (Losses)	1,000,000
Cash Received (Paid)	(3,400,000)
Level 2 [Member] | Foreign Exchange Contract, Seven [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	1,100,000
Hedge Liability	0
Change in Unrealized Gains (Losses)	4,900,000
Realized Gains (Losses)	5,900,000
Cash Received (Paid)	25,700,000
Level 2 [Member] | KWE [Member] | Foreign Exchange Contract, Two [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	300,000
Hedge Liability	(59,900,000)
Change in Unrealized Gains (Losses)	(63,100,000)
Realized Gains (Losses)	0
Cash Received (Paid)	0
Level 2 [Member] | KWE [Member] | Foreign Exchange Contract, Three [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	0
Hedge Liability	0
Change in Unrealized Gains (Losses)	(45,500,000)
Realized Gains (Losses)	0
Cash Received (Paid)	0
Level 2 [Member] | KWE [Member] | Foreign Exchange Contract, Six [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	0
Hedge Liability	0
Change in Unrealized Gains (Losses)	(700,000)
Realized Gains (Losses)	700,000
Cash Received (Paid)	0
Noncontrolling Interest [Member] | Level 2 [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	200,000
Hedge Liability	(46,900,000)
Change in Unrealized Gains (Losses)	86,700,000
Realized Gains (Losses)	0
Cash Received (Paid)	0
Parent [Member] | Level 2 [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Hedge Asset	20,200,000.0
Hedge Liability	(15,000,000)
Change in Unrealized Gains (Losses)	(5,100,000.0)
Realized Gains (Losses)	7,600,000.0
Cash Received (Paid)	$ 22,300,000.0