Long-Term Debt And Short-Term Borrowings (Interest Rates) (Details) - Secured Debt - Senior Secured Credit Facility Due January 2022	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Euro/AUD/CDN | 4.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.50%
Euro/AUD/CDN | ≤ 4.00 to 1.00 and 3.50 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.25%
Euro/AUD/CDN | ≤ 3.50 to 1.00 and 3.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.00%
Euro/AUD/CDN | ≤ 3.00 to 1.00 and 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Euro/AUD/CDN | ≤ 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
Base Rate | 4.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Base Rate | ≤ 4.00 to 1.00 and 3.50 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
Base Rate | ≤ 3.50 to 1.00 and 3.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Base Rate | ≤ 3.00 to 1.00 and 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Base Rate | ≤ 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.25%
Minimum | Eurodollar
Debt Instrument [Line Items]
Debt Instrument Base Rate	0.00%