Stock-based Compensation (Schedule of Restricted Stock Unit Grants For The Period) (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Dec. 31, 2016 installment shares
Granted, shares	1,391,000
TSR Units [Member]
Granted, shares	356,000	[1]
Performance-Based
Number of equal annual installments | installment	3
Time-based Award [Member]
Granted, shares	719,000	[2]
Number of equal annual installments | installment	3
Maximum [Member] | TSR Units [Member]
Granted, shares	495,000	[1]
Maximum [Member] | Performance-Based
Granted, shares	316,000

[1] The TSR units were granted to our executive officers pursuant to the terms described below.

[2] The service-based RSUs were granted to employees and our executive officers. All service-based RSUs will vest in three substantially equal annual installments on or about the anniversary of the date of grant.