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Long-Term Debt (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 2 Months Ended | 0 Months Ended | ||||
|---|---|---|---|---|---|---|---|
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Jun. 03, 2013
Northern Indiana [Member]
Pollution Control Bond [Member]
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Apr. 12, 2013
NiSource Finance [Member]
4.80% Senior Unsecured Notes Due February 15, 2044 [Member]
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Mar. 01, 2013
NiSource Finance [Member]
6.15% Notes Due 2013 [Member]
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Apr. 15, 2013
NiSource Finance [Member]
LIBOR plus 125 basis points three-year bank term loan due April 15, 2016
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Apr. 05, 2012
NiSource Finance [Member]
LIBOR plus 125 basis points three-year bank term loan due April 15, 2016
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Apr. 05, 2012
NiSource Finance [Member]
Previous Maximum [Member]
LIBOR plus 125 basis points three-year bank term loan due April 15, 2016
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Apr. 15, 2013
NiSource Finance [Member]
Current Maximum [Member]
LIBOR plus 125 basis points three-year bank term loan due April 15, 2016
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| Debt Instrument [Line Items] | |||||||
| Face amount of notes | $ 18.0 | $ 750.0 | $ 250.0 | $ 325.0 | |||
| Debt instrument maturity date | Feb. 15, 2044 | Apr. 15, 2016 | Apr. 03, 2015 | ||||
| Repayments of Senior Debt | $ 420.3 | ||||||
| Interest rate on debt | 5.20% | 4.80% | 6.15% | ||||
| Debt Instrument, Basis Spread on Variable Rate | 1.25% | ||||||
| Long term debt note term | 3 years | ||||||