Contingencies and Healthcare Regulation (Capital Expenditure Commitments) (Details) (USD $) In Millions, unless otherwise specified	5 Months Ended		6 Months Ended	12 Months Ended	18 Months Ended			12 Months Ended					12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 DMC commitment [Member]	Jun. 30, 2013 DMC commitment [Member]	Jun. 30, 2012 DMC commitment [Member]	Jan. 02, 2012 DMC commitment [Member]	Jun. 30, 2013 Other commitments [Member]	Jun. 30, 2013 Capital Addition Purchase Commitments [Member] DMC commitment [Member]	Dec. 31, 2011 Calendar Year 2011 [Member] DMC commitment [Member]	Dec. 31, 2012 Calendar Year 2011 [Member] Capital Addition Purchase Commitments, Specific Expansion Projects [Member] DMC commitment [Member]	Dec. 31, 2012 Calendar Year 2012 [Member] Capital Addition Purchase Commitments, Specific Expansion Projects [Member] DMC commitment [Member]	Feb. 28, 2013 Calendar Year 2012 [Member] Capital Addition Purchase Commitments, Specific Expansion Projects [Member] DMC commitment [Member]	Jun. 30, 2013 Calendar Year 2013 [Member] Capital Addition Purchase Commitments, Specific Expansion Projects [Member] DMC commitment [Member]
Capital Expenditure Commitment [Line Items]
Commitment amount				$ 850.0
Commitment period, years								5 years
Amount allocated to specific projects				500.0
Actual expense			31.5		321.0					41.8
Long-term Purchase Commitment, Amount											80.0		80.0
Actual expense on specific projects					191.5
Required amount to be spent on specific projects									80.0
Escrowed cash for capital commitments	0	20.3				41.8						27.8
Cash received from escrowed capital reimbursement account	27.8
Other capital expediture commitment							$ 70.4